ssl/s2_lib.c

   1 /* ssl/s2_lib.c */
   2 /* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
   3  * All rights reserved.
   4  *
   5  * This package is an SSL implementation written
   6  * by Eric Young (eay@cryptsoft.com).
   7  * The implementation was written so as to conform with Netscapes SSL.
   8  *
   9  * This library is free for commercial and non-commercial use as long as
  10  * the following conditions are aheared to.  The following conditions
  11  * apply to all code found in this distribution, be it the RC4, RSA,
  12  * lhash, DES, etc., code; not just the SSL code.  The SSL documentation
  13  * included with this distribution is covered by the same copyright terms
  14  * except that the holder is Tim Hudson (tjh@cryptsoft.com).
  15  *
  16  * Copyright remains Eric Young's, and as such any Copyright notices in
  17  * the code are not to be removed.
  18  * If this package is used in a product, Eric Young should be given attribution
  19  * as the author of the parts of the library used.
  20  * This can be in the form of a textual message at program startup or
  21  * in documentation (online or textual) provided with the package.
  22  *
  23  * Redistribution and use in source and binary forms, with or without
  24  * modification, are permitted provided that the following conditions
  25  * are met:
  26  * 1. Redistributions of source code must retain the copyright
  27  *    notice, this list of conditions and the following disclaimer.
  28  * 2. Redistributions in binary form must reproduce the above copyright
  29  *    notice, this list of conditions and the following disclaimer in the
  30  *    documentation and/or other materials provided with the distribution.
  31  * 3. All advertising materials mentioning features or use of this software
  32  *    must display the following acknowledgement:
  33  *    "This product includes cryptographic software written by
  34  *     Eric Young (eay@cryptsoft.com)"
  35  *    The word 'cryptographic' can be left out if the rouines from the library
  36  *    being used are not cryptographic related :-).
  37  * 4. If you include any Windows specific code (or a derivative thereof) from
  38  *    the apps directory (application code) you must include an acknowledgement:
  39  *    "This product includes software written by Tim Hudson (tjh@cryptsoft.com)"
  40  *
  41  * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND
  42  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  43  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  44  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
  45  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  46  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  47  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  48  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  49  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  50  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  51  * SUCH DAMAGE.
  52  *
  53  * The licence and distribution terms for any publically available version or
  54  * derivative of this code cannot be changed.  i.e. this code cannot simply be
  55  * copied and put under another distribution licence
  56  * [including the GNU Public Licence.]
  57  */
  58
  59 #ifndef NO_RSA
  60 #include <stdio.h>
  61 #include <openssl/rsa.h>
  62 #include <openssl/objects.h>
  63 #include "ssl_locl.h"
  64
  65 static long ssl2_default_timeout(void );
  66 const char *ssl2_version_str="SSLv2" OPENSSL_VERSION_PTEXT;
  67
  68 #define SSL2_NUM_CIPHERS (sizeof(ssl2_ciphers)/sizeof(SSL_CIPHER))
  69
  70 SSL_CIPHER ssl2_ciphers[]={
  71 /* NULL_WITH_MD5 v3 */
  72 #if 0
  73         {
  74         1,
  75         SSL2_TXT_NULL_WITH_MD5,
  76         SSL2_CK_NULL_WITH_MD5,
  77         SSL_kRSA|SSL_aRSA|SSL_eNULL|SSL_MD5|SSL_EXP40|SSL_SSLV2,
  78         0,
  79         SSL_ALL_CIPHERS,
  80         },
  81 #endif
  82 /* RC4_128_EXPORT40_WITH_MD5 */
  83         {
  84         1,
  85         SSL2_TXT_RC4_128_EXPORT40_WITH_MD5,
  86         SSL2_CK_RC4_128_EXPORT40_WITH_MD5,
  87         SSL_kRSA|SSL_aRSA|SSL_RC4|SSL_MD5|SSL_EXP40|SSL_SSLV2,
  88         SSL2_CF_5_BYTE_ENC,
  89         SSL_ALL_CIPHERS,
  90         },
  91 /* RC4_128_WITH_MD5 */
  92         {
  93         1,
  94         SSL2_TXT_RC4_128_WITH_MD5,
  95         SSL2_CK_RC4_128_WITH_MD5,
  96         SSL_kRSA|SSL_aRSA|SSL_RC4|SSL_MD5|SSL_NOT_EXP|SSL_SSLV2|SSL_MEDIUM,
  97         0,
  98         SSL_ALL_CIPHERS,
  99         },
 100 /* RC2_128_CBC_EXPORT40_WITH_MD5 */
 101         {
 102         1,
 103         SSL2_TXT_RC2_128_CBC_EXPORT40_WITH_MD5,
 104         SSL2_CK_RC2_128_CBC_EXPORT40_WITH_MD5,
 105         SSL_kRSA|SSL_aRSA|SSL_RC2|SSL_MD5|SSL_EXP40|SSL_SSLV2,
 106         SSL2_CF_5_BYTE_ENC,
 107         SSL_ALL_CIPHERS,
 108         },
 109 /* RC2_128_CBC_WITH_MD5 */
 110         {
 111         1,
 112         SSL2_TXT_RC2_128_CBC_WITH_MD5,
 113         SSL2_CK_RC2_128_CBC_WITH_MD5,
 114         SSL_kRSA|SSL_aRSA|SSL_RC2|SSL_MD5|SSL_NOT_EXP|SSL_SSLV2|SSL_MEDIUM,
 115         0,
 116         SSL_ALL_CIPHERS,
 117         },
 118 /* IDEA_128_CBC_WITH_MD5 */
 119         {
 120         1,
 121         SSL2_TXT_IDEA_128_CBC_WITH_MD5,
 122         SSL2_CK_IDEA_128_CBC_WITH_MD5,
 123         SSL_kRSA|SSL_aRSA|SSL_IDEA|SSL_MD5|SSL_NOT_EXP|SSL_SSLV2|SSL_MEDIUM,
 124         0,
 125         SSL_ALL_CIPHERS,
 126         },
 127 /* DES_64_CBC_WITH_MD5 */
 128         {
 129         1,
 130         SSL2_TXT_DES_64_CBC_WITH_MD5,
 131         SSL2_CK_DES_64_CBC_WITH_MD5,
 132         SSL_kRSA|SSL_aRSA|SSL_DES|SSL_MD5|SSL_NOT_EXP|SSL_SSLV2|SSL_LOW,
 133         0,
 134         SSL_ALL_CIPHERS,
 135         },
 136 /* DES_192_EDE3_CBC_WITH_MD5 */
 137         {
 138         1,
 139         SSL2_TXT_DES_192_EDE3_CBC_WITH_MD5,
 140         SSL2_CK_DES_192_EDE3_CBC_WITH_MD5,
 141         SSL_kRSA|SSL_aRSA|SSL_3DES|SSL_MD5|SSL_NOT_EXP|SSL_SSLV2|SSL_HIGH,
 142         0,
 143         SSL_ALL_CIPHERS,
 144         },
 145 /* RC4_64_WITH_MD5 */
 146 #if 1
 147         {
 148         1,
 149         SSL2_TXT_RC4_64_WITH_MD5,
 150         SSL2_CK_RC4_64_WITH_MD5,
 151         SSL_kRSA|SSL_aRSA|SSL_RC4|SSL_MD5|SSL_SSLV2|SSL_LOW,
 152         SSL2_CF_8_BYTE_ENC,
 153         SSL_ALL_CIPHERS,
 154         },
 155 #endif
 156 /* NULL SSLeay (testing) */
 157 #if 0
 158         {
 159         0,
 160         SSL2_TXT_NULL,
 161         SSL2_CK_NULL,
 162         0,
 163         SSL_ALL_CIPHERS,
 164         },
 165 #endif
 166
 167 /* end of list :-) */
 168         };
 169
 170 static SSL_METHOD SSLv2_data= {
 171         SSL2_VERSION,
 172         ssl2_new,       /* local */
 173         ssl2_clear,     /* local */
 174         ssl2_free,      /* local */
 175         ssl_undefined_function,
 176         ssl_undefined_function,
 177         ssl2_read,
 178         ssl2_peek,
 179         ssl2_write,
 180         ssl2_shutdown,
 181         ssl_ok, /* NULL - renegotiate */
 182         ssl_ok, /* NULL - check renegotiate */
 183         ssl2_ctrl,      /* local */
 184         ssl2_ctx_ctrl,  /* local */
 185         ssl2_get_cipher_by_char,
 186         ssl2_put_cipher_by_char,
 187         ssl2_pending,
 188         ssl2_num_ciphers,
 189         ssl2_get_cipher,
 190         ssl_bad_method,
 191         ssl2_default_timeout,
 192         &ssl3_undef_enc_method,
 193         };
 194
 195 static long ssl2_default_timeout(void)
 196         {
 197         return(300);
 198         }
 199
 200 SSL_METHOD *sslv2_base_method(void)
 201         {
 202         return(&SSLv2_data);
 203         }
 204
 205 int ssl2_num_ciphers(void)
 206         {
 207         return(SSL2_NUM_CIPHERS);
 208         }
 209
 210 SSL_CIPHER *ssl2_get_cipher(unsigned int u)
 211         {
 212         if (u < SSL2_NUM_CIPHERS)
 213                 return(&(ssl2_ciphers[SSL2_NUM_CIPHERS-1-u]));
 214         else
 215                 return(NULL);
 216         }
 217
 218 int ssl2_pending(SSL *s)
 219         {
 220         return(s->s2->ract_data_length);
 221         }
 222
 223 int ssl2_new(SSL *s)
 224         {
 225         SSL2_CTX *s2;
 226
 227         if ((s2=(SSL2_CTX *)Malloc(sizeof(SSL2_CTX))) == NULL) goto err;
 228         memset(s2,0,sizeof(SSL2_CTX));
 229
 230         if ((s2->rbuf=(unsigned char *)Malloc(
 231                 SSL2_MAX_RECORD_LENGTH_2_BYTE_HEADER+2)) == NULL) goto err;
 232         if ((s2->wbuf=(unsigned char *)Malloc(
 233                 SSL2_MAX_RECORD_LENGTH_2_BYTE_HEADER+2)) == NULL) goto err;
 234         s->s2=s2;
 235
 236         ssl2_clear(s);
 237         return(1);
 238 err:
 239         if (s2 != NULL)
 240                 {
 241                 if (s2->wbuf != NULL) Free(s2->wbuf);
 242                 if (s2->rbuf != NULL) Free(s2->rbuf);
 243                 Free(s2);
 244                 }
 245         return(0);
 246         }
 247
 248 void ssl2_free(SSL *s)
 249         {
 250         SSL2_CTX *s2;
 251
 252         if(s == NULL)
 253             return;
 254
 255         s2=s->s2;
 256         if (s2->rbuf != NULL) Free(s2->rbuf);
 257         if (s2->wbuf != NULL) Free(s2->wbuf);
 258         memset(s2,0,sizeof(SSL2_CTX));
 259         Free(s2);
 260         s->s2=NULL;
 261         }
 262
 263 void ssl2_clear(SSL *s)
 264         {
 265         SSL2_CTX *s2;
 266         unsigned char *rbuf,*wbuf;
 267
 268         s2=s->s2;
 269
 270         rbuf=s2->rbuf;
 271         wbuf=s2->wbuf;
 272
 273         memset(s2,0,sizeof(SSL2_CTX));
 274
 275         s2->rbuf=rbuf;
 276         s2->wbuf=wbuf;
 277         s2->clear_text=1;
 278         s->packet=s2->rbuf;
 279         s->version=SSL2_VERSION;
 280         s->packet_length=0;
 281         }
 282
 283 long ssl2_ctrl(SSL *s, int cmd, long larg, char *parg)
 284         {
 285         int ret=0;
 286
 287         switch(cmd)
 288                 {
 289         case SSL_CTRL_GET_SESSION_REUSED:
 290                 ret=s->hit;
 291                 break;
 292         default:
 293                 break;
 294                 }
 295         return(ret);
 296         }
 297
 298 long ssl2_ctx_ctrl(SSL_CTX *ctx, int cmd, long larg, char *parg)
 299         {
 300         return(0);
 301         }
 302
 303 /* This function needs to check if the ciphers required are actually
 304  * available */
 305 SSL_CIPHER *ssl2_get_cipher_by_char(const unsigned char *p)
 306         {
 307         static int init=1;
 308         static SSL_CIPHER *sorted[SSL2_NUM_CIPHERS];
 309         SSL_CIPHER c,*cp= &c,**cpp;
 310         unsigned long id;
 311         int i;
 312
 313         if (init)
 314                 {
 315                 CRYPTO_w_lock(CRYPTO_LOCK_SSL);
 316
 317                 for (i=0; i<SSL2_NUM_CIPHERS; i++)
 318                         sorted[i]= &(ssl2_ciphers[i]);
 319
 320                 qsort(  (char *)sorted,
 321                         SSL2_NUM_CIPHERS,sizeof(SSL_CIPHER *),
 322                         FP_ICC ssl_cipher_ptr_id_cmp);
 323
 324                 CRYPTO_w_unlock(CRYPTO_LOCK_SSL);
 325                 init=0;
 326                 }
 327
 328         id=0x02000000L|((unsigned long)p[0]<<16L)|
 329                 ((unsigned long)p[1]<<8L)|(unsigned long)p[2];
 330         c.id=id;
 331         cpp=(SSL_CIPHER **)OBJ_bsearch((char *)&cp,
 332                 (char *)sorted,
 333                 SSL2_NUM_CIPHERS,sizeof(SSL_CIPHER *),
 334                 (int (*)())ssl_cipher_ptr_id_cmp);
 335         if ((cpp == NULL) || !(*cpp)->valid)
 336                 return(NULL);
 337         else
 338                 return(*cpp);
 339         }
 340
 341 int ssl2_put_cipher_by_char(const SSL_CIPHER *c, unsigned char *p)
 342         {
 343         long l;
 344
 345         if (p != NULL)
 346                 {
 347                 l=c->id;
 348                 if ((l & 0xff000000) != 0x02000000) return(0);
 349                 p[0]=((unsigned char)(l>>16L))&0xFF;
 350                 p[1]=((unsigned char)(l>> 8L))&0xFF;
 351                 p[2]=((unsigned char)(l     ))&0xFF;
 352                 }
 353         return(3);
 354         }
 355
 356 void ssl2_generate_key_material(SSL *s)
 357         {
 358         unsigned int i;
 359         MD5_CTX ctx;
 360         unsigned char *km;
 361         unsigned char c='0';
 362
 363         km=s->s2->key_material;
 364         for (i=0; i<s->s2->key_material_length; i+=MD5_DIGEST_LENGTH)
 365                 {
 366                 MD5_Init(&ctx);
 367
 368                 MD5_Update(&ctx,s->session->master_key,s->session->master_key_length);
 369                 MD5_Update(&ctx,(unsigned char *)&c,1);
 370                 c++;
 371                 MD5_Update(&ctx,s->s2->challenge,s->s2->challenge_length);
 372                 MD5_Update(&ctx,s->s2->conn_id,s->s2->conn_id_length);
 373                 MD5_Final(km,&ctx);
 374                 km+=MD5_DIGEST_LENGTH;
 375                 }
 376         }
 377
 378 void ssl2_return_error(SSL *s, int err)
 379         {
 380         if (!s->error)
 381                 {
 382                 s->error=3;
 383                 s->error_code=err;
 384
 385                 ssl2_write_error(s);
 386                 }
 387         }
 388
 389
 390 void ssl2_write_error(SSL *s)
 391         {
 392         unsigned char buf[3];
 393         int i,error;
 394
 395         buf[0]=SSL2_MT_ERROR;
 396         buf[1]=(s->error_code>>8)&0xff;
 397         buf[2]=(s->error_code)&0xff;
 398
 399 /*      state=s->rwstate;*/
 400         error=s->error;
 401         s->error=0;
 402         i=ssl2_write(s,&(buf[3-error]),error);
 403 /*      if (i == error) s->rwstate=state; */
 404
 405         if (i < 0)
 406                 s->error=error;
 407         else if (i != s->error)
 408                 s->error=error-i;
 409         /* else
 410                 s->error=0; */
 411         }
 412
 413 int ssl2_shutdown(SSL *s)
 414         {
 415         s->shutdown=(SSL_SENT_SHUTDOWN|SSL_RECEIVED_SHUTDOWN);
 416         return(1);
 417         }
 418 #endif